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1.缺锌原因土壤含锌量低和土壤缺有效锌失去平衡是缺锌的主要原因。吉林省大部分耕地,特别是中西部地区黑土、黑钙土、淡黑钙土、石灰性草甸土、盐碱土等,土壤有效锌含量低,属缺锌或潜在缺锌土壤;农业集约化程度提高,氮磷化肥用量增加,人为调节锌素营养不良,导致锌素营养入不抵出,打破了土壤中原来的锌量的平衡;大量磷肥的施入,降低了土壤锌的有效性,也将导致出现缺锌症状。2.缺锌症状玉米缺锌主要表现在苗期,在缺锌的土壤上,玉米
1. The causes of zinc deficiency Soil zinc content is low and the lack of effective zinc deficiency in the soil is the main reason for zinc deficiency. Most of the cultivated land in Jilin Province, especially the black soil, chernozem, calcareous soil, calcareous meadow soil and saline-alkali soil in the central and western regions, has a low available zinc content and is deficient in zinc or potentially zinc-deficient soil. Agricultural intensification Increase the amount of nitrogen and phosphorus fertilizer, artificially adjust zinc malnutrition, lead to zinc nutrition into the non-arrived, breaking the balance of the original zinc in the soil; a large number of phosphate fertilizer applied to reduce the effectiveness of soil zinc, Will also lead to zinc deficiency symptoms. 2. Zinc deficiency symptoms Corn zinc deficiency mainly in the seedling stage, zinc deficiency in the soil, corn